Porter suggested Dawkins ran from the off-duty deputy because he wasn't in uniform, and witnesses testified they didn't hear him identify himself.

"They didn't hear anything about 'arrests', 'police', 'get on the ground'. That's because it didn't happen," Porter said. "[Dawkins] doesn't know that this man is a law enforcement officer.... If anyone acted in self-defense in this case it's Mr. Dawkins, not the defendant."

Sheriff's Deputy Charged with Murder Takes the Stand in His Own Defense

Defense attorney Megan Thomas handled closing arguments for Patterson's side. She began by acknowledging Dawkins' death as a loss to the community. But she said, "A tragedy isn't a murder, a tragedy doesn't make Mr. Patterson, a 17-year veteran, a father of three, a murderer."

Thomas challenged the prosecution's theory that Patterson acted out of disrespect, or that he was angry following his first exchange with Dawkins that evening.

"Bruised his ego so badly that he shot and killed Julian Dawkins? That doesn't make sense," Thomas said. "Why does he bother with his handcuffs at all?...If he was so enraged, all he needed was a gun."

She also called out the prosecution's witnesses saying, "They were biased witnesses that weren't telling the truth...They were lying."

She warned jurors that the community outrage should have no bearing on their decisions.

"They're so angry about what happened and they're so angry with this man," Thomas said while pointing at Patterson. "...[T]hey want to make him pay. He didn't have any other choice."

During the rebuttal, Porter challenged Thomas' closing remarks.

"Ms. Thomas says Mr. Patterson didn't have another choice, how about calling 911? ... He didn't want to call 911...instead he went back to get even on his terms."

During his testimony Wednesday, Patterson conceded he was off duty at the time and out of his jurisdiction, but had the right to make a citizen's arrest.

He said he ran into Dawkins on the street in the Lynnhaven section of Alexandria while on a walk. He described the 22-year-old as intoxicated and a little aggressive. Patterson went on to tell the court that Dawkins pulled a knife on him.

"He took a step toward me.... I started running and he started chasing me.... I'm feeling I'm in danger," he said.

Patterson testified he then headed back to his car to grab only his handcuffs, preparing to arrest Dawkins, if necessary.

The two men met up again just a few blocks away.

Dabbing his eyes with a tissue on the stand, Patterson said: "[Dawkins] turned around, charged back at me and took a swing back at me.... I thought he had the knife in his hands. At that point I retrieved my weapon and fired."

Porter asked about the timing of his actions, specifically questioning why Patterson did not use his cell phone before running back to confront Dawkins.

"Did you think about calling the police at that point?" Porter questioned.

"I was going to call the police as soon as I got back to the young man to see where he's at to tell the police," Patterson replied.

But the prosecutor went on, "Why would you wait? Why didn't you call for backup, sir?"

"I've already answered that question," Patterson said. "I wanted to get eyes on him first before calling 911."

At times, Patterson stumbled on his words. He admitted he'd only identified himself as law enforcement twice before killing Dawkins.

"It was moving so quickly. I didn't give him another command," he said. "Did you pull your badge and wave it?" Porter asked.

Patterson replied, "No."

Patterson had a lot of supporters take the stand on his behalf Wednesday, including his ex-wife, eldest son and several deputies from Arlington County.

The jury, made up of six men and six women, could find Patterson guilty of first degree murder, second degree murder, voluntary manslaughter or they could find him not guilty. If convicted, he faces up to life in prison.